Can you tell the difference?
This is a genuine Nissan Key from the dealership
Garanteed to work no problem for around 5 years without even the battery replaced. there is not much I can say about them as they are reliable and do the job.
They do come with the barcoded packet with corresponding part number for your car
I only use these Genuine smart keys.
Here is a Knock-off smart-key, they mostly dont program in properly, or worse still fail while sitting in your drawer. You will usually find out at the very worst time when it's needed to run the car. They can also cause other issues down the track that can cost thousands for you to rectify at the dealership.
Its very hard to tell the difference, they cost between $40 to $100 from ebay and you will waste another $120 trying to get a technition to diagnostically program it. There are people out there that supply these, the tell tale sign is that they are sold complete for under $300
If you want reliability, You will need a brand new genuine smart key.